Chit-chat on Lagrange's four-square theorem

Lagrange’s four-square theorem is a beautiful result in number theory. However, to the best of my knowledge, I haven’t encountered it often in theoretical computer science. Today’s entry discusses two interesting stories related to this theorem.

Lagrange's four-square theorem - Wikipedia

Fundamental, PDF, Group (Mathematics)

Empirical Metamathematics

Ghulam Mustafa on LinkedIn: Statistical Mechanics of ML

PDF) Two refinements of Lagrange's four-square theorem

Lagrange's Four-Square Theorem Seen Using Polygons and Lines - Wolfram Demonstrations Project

Lagrange's Four-Square Theorem -- from Wolfram MathWorld

Lagrange's Four-Square Theorem Seen Using Polygons and Lines - Wolfram Demonstrations Project

Chit-chat on Lagrange's four-square theorem

Lagrange's four-square theorem - Wikipedia

LAGRANGE'S FOUR SQUARE THEOREM Theorems, Lagrange theorem, Number theory

Training dragons the hard way - Programming Every Day!: Perfect Squares [LeetCode] Part 2: Solve it Mathematically

What is lagrange theorem? - Quora